prostomium

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prostomium

(prō-stō′mē-əm)
n. pl. prosto·mia (-mē-ə)
The anterior portion of the head of an annelid worm, situated in front of the mouth.

pro·sto′mi·al (-əl) adj.

prostomium

that part of the head of some annelids and molluscs which lies in front of the mouth.
References in periodicals archive ?
The antennae are articulated while the prostomial and dorsal cirri are not.
Diagnosis: The prostomial appendages are articulated with subspherical articles and the peristomial and dorsal cirri are also articulated.
The cilia of the prostomial tufts were nonmotile and relatively short: they numbered about 13-20 cilia per tufi (Fig.
Palp and prostomial sensory cells shared similar ultrastructural characteristics.
Each recipient female was injected with one prostomial equivalent of homogenate and placed into fresh seawater to spawn.
During the experimental period for prostomial manipulation (26 February-14 March), 80% of the [LD8:16.